The hyperbola x²/25 - y²/144 = 1 has foci at (±c, 0). What is c?
Question 1
Q1. The hyperbola x²/25 - y²/144 = 1 has foci at (±c, 0). What is c?
Answer: 13
Explanation: c² = a² + b² = 25 + 144 = 169 → c = 13.